Risk Factors for Eye Cancer: What Raises and Lowers Your Chances
Understanding risk factors for eye cancer can help you make sense of your own situation, but it will not give you a firm answer about why this happened to you or to your child. This guide focuses on uveal melanoma, the most common primary eye cancer in adults, and covers retinoblastoma, the eye cancer of young children, in its own labeled section because its risk factors work very differently. A risk factor is anything that raises the chance of developing a disease. Having one, or even several, does not mean you will get eye cancer, and many people who develop it have no known risk factor at all.
What Raises Your Risk for Developing Eye Cancer?
Several traits are linked to a higher chance of developing uveal melanoma, and most of them relate to pigmentation, the natural coloring in your skin, hair, and eyes.
Light eye color: People with blue, green, gray, or other light colored eyes have a somewhat higher risk of uveal melanoma than people with darker eye color. Melanoma of the eye develops from pigment-producing cells, so traits linked to lower pigmentation appear to play a role.
Fair skin: Having fair skin that freckles or burns easily, or that tans poorly, is linked to a higher risk, similar to the pattern seen with skin melanoma. People who are White are affected far more often than people who are Black, Asian, or Hispanic.
Older age: Uveal melanoma can occur at any age, but the risk rises as people get older. Most people are diagnosed in their fifties or sixties, with the average age at diagnosis commonly cited as around 55 to 60 years old, and the rate of new cases continues to climb into the seventies before leveling off.
Ocular or oculodermal melanocytosis: This is an uncommon condition in which there is extra pigmentation in and around the eye, sometimes also affecting the skin around the eye (when it involves the skin, it is called oculodermal melanocytosis, or nevus of Ota). People with this condition have a higher lifetime risk of developing uveal melanoma and are typically monitored more closely by an eye doctor.
BAP1 tumor predisposition syndrome: This is a rare inherited condition, caused by a mutation in the BAP1 gene, that raises the risk of several cancers, including uveal melanoma, skin melanoma, mesothelioma, and kidney cancer, in the affected person and their close blood relatives. Only a minority of people with uveal melanoma have this syndrome, but for those who do, cancers tend to appear at younger ages and genetic counseling for the whole family becomes an important, real step to take.
A family history of BAP1 syndrome cancers: If close relatives have had eye melanoma, skin melanoma, mesothelioma, or kidney cancer, particularly at a younger than usual age, this pattern can be a clue that BAP1 syndrome runs in the family, and it is worth mentioning to your doctor.
Existing moles or pigmented spots in the eye: A choroidal nevus (a benign, not cancerous pigmented spot on the choroid, essentially a freckle inside the eye), a giant choroidal nevus, or an iris nevus are all linked to a somewhat higher chance of developing melanoma at that same site over time. It is important to understand that the overwhelming majority of these spots stay benign for life. This is why doctors recommend monitoring a known nevus with periodic eye exams and photographs rather than removing or treating it right away.
Ultraviolet (UV) light exposure has been studied as a possible risk factor for uveal melanoma, following the same logic that applies to skin melanoma. Here, honesty matters: the evidence for uveal melanoma is weaker and far less consistent than it is for skin melanoma. Some studies suggest a small possible link, especially in people with intense occupational UV exposure such as welders, while other studies find no clear connection at all. Researchers have also found that the pattern of genetic mutations inside uveal melanoma tumors does not look like the classic sun damage pattern seen in skin melanoma, which raises real questions about whether UV light causes uveal melanoma in the same way it causes skin cancer. More research is needed before this can be called an established cause.
It is important to say plainly that most people who develop uveal melanoma have no identifiable risk factor at all. If you are searching for something you did wrong, or something you could have prevented, you are unlikely to find it, and that is a normal and common experience for people with this diagnosis. For a broader look at what a uveal melanoma diagnosis involves, see the guide on eye cancer facts.
Retinoblastoma Risk Factors
Retinoblastoma is a different eye cancer that mainly affects young children, and its main risk factor works completely differently from anything listed above. The main risk factor for retinoblastoma is an inherited change (mutation) in the RB1 gene, a gene that normally helps keep cells from growing out of control. When a child inherits an RB1 mutation, that change is present in cells throughout the body, not just in the eye, and this is called heritable retinoblastoma.
Heritable RB1 mutations are especially important in children with tumors in both eyes (bilateral retinoblastoma) or a family history of retinoblastoma, since these patterns often point to the inherited form. About 4 in 10 children diagnosed with retinoblastoma have the heritable form. However, only about 1 in 4 children with heritable retinoblastoma actually have a known family history, since many heritable cases arise from a brand new RB1 mutation in that child rather than being passed down from a parent. This is why genetic testing, not just a family history question, is the reliable way to identify which children have the heritable form.
Most cases of retinoblastoma, however, are not inherited. About 6 in 10 cases happen because of a sporadic (not inherited, chance) RB1 gene change that occurs only in the retinal cells of one eye, unrelated to anything the parents did or passed down. These sporadic cases tend to be diagnosed in slightly older children and almost always affect only one eye.
Age itself is a risk marker as well, since nearly all retinoblastoma is diagnosed before age 5, and about two out of three cases are found before age 2. Parents sometimes wonder about their own exposures during pregnancy; researchers have looked at a few possible parental factors, such as a father's workplace chemical exposure, but no clear, proven cause beyond the RB1 gene change itself has been established. If your child has been diagnosed with retinoblastoma, it is important to know that nothing you did caused it.
Factors That May Lower Your Risk of Eye Cancer
It needs to be said plainly and honestly: there is currently no proven way to prevent uveal melanoma. The National Cancer Institute states directly that it does not have evidence-based information on preventing this cancer, and no study has shown that any specific action reliably stops uveal melanoma from developing. If you are looking for a lifestyle change that guarantees protection, it does not exist yet, and no responsible source should tell you otherwise.
That said, there are genuinely useful, actionable steps that can help, even though they do not prevent the cancer itself from forming. The most important one is getting regular comprehensive dilated eye exams, where an eye doctor puts drops in your eyes to widen the pupils and get a full look at the retina, choroid, and other inner structures. Because uveal melanoma so often causes no early symptoms, a dilated exam is frequently the only way a suspicious spot gets found while it is still small. Finding a nevus or an early melanoma sooner gives you and your doctor more options and more time to decide on the right next step. Learn more about this process in the guide on how eye cancer is diagnosed.
Wearing sunglasses that block ultraviolet light is a reasonable general eye health habit, and it is worth doing for reasons that go beyond melanoma, including protecting against cataracts and other UV-related eye damage. As explained above, direct proof that sun protection prevents uveal melanoma is limited, and the evidence is mixed, so this should be framed honestly as a sensible general precaution rather than a guaranteed shield against this specific cancer.
For the minority of people with BAP1 tumor predisposition syndrome, or a family pattern suggestive of it, genetic counseling is a real and valuable step. A genetic counselor can help a family understand their risk, decide whether genetic testing makes sense, and set up an appropriate schedule of skin checks, eye exams, and other cancer screening for relatives who share the risk. This does not prevent the syndrome, but it can lead to earlier detection of any cancer that does develop.
Finally, prompt evaluation of any new visual symptom remains a genuinely useful habit, discussed in detail in the guide on eye cancer symptoms. Reporting a new dark spot, a shadow, flashes of light, or a change in vision to your eye doctor without delay will not prevent eye cancer from forming, but it does give you the best chance of catching something early if it turns out to matter.
For retinoblastoma, there is likewise no known way to prevent the disease itself in a child who has inherited an RB1 mutation or who develops a sporadic one. The real, actionable step for families is genetic counseling and early surveillance for known carrier families. Parents who have had retinoblastoma themselves, or who have a strong family history, can meet with a genetic counselor before or during a pregnancy to understand the odds of passing on the RB1 change and to discuss options, and children born into these families can begin careful eye exams starting shortly after birth. This should be understood honestly as reducing the risk of a late diagnosis, catching a tumor while it is small and highly treatable, rather than reducing the risk of the disease itself occurring. Because early detection so strongly improves outcomes, this surveillance is one of the most meaningful things a family history can offer a newborn at risk. Always talk with your own doctor, a genetic counselor, or your child's care team about what your specific family history and test results mean for you.